Surveying or land surveying is the technique and science of determining the terrestrial or three-dimensional positions of points and the distances and angles between them. A land surveying professional is called a land surveyor; these points are on the surface of the Earth, they are used to establish maps and boundaries for ownership, such as building corners or the surface location of subsurface features, or other purposes required by government or civil law, such as property sales. Surveyors work with elements of geometry, regression analysis, engineering, programming languages, the law, they use equipment, such as total stations, robotic total stations, theodolites, GNSS receivers, retroreflectors, 3D scanners, handheld tablets, digital levels, subsurface locators, drones, GIS, surveying software. Surveying has been an element in the development of the human environment since the beginning of recorded history; the planning and execution of most forms of construction require it. It is used in transport, communications and the definition of legal boundaries for land ownership.
It is an important tool for research in many other scientific disciplines. The International Federation of Surveyors defines the function of surveying as: A surveyor is a professional person with the academic qualifications and technical expertise to conduct one, or more, of the following activities. Surveying has occurred since humans built the first large structures. In ancient Egypt, a rope stretcher would use simple geometry to re-establish boundaries after the annual floods of the Nile River; the perfect squareness and north-south orientation of the Great Pyramid of Giza, built c. 2700 BC, affirm the Egyptians' command of surveying. The Groma instrument originated in Mesopotamia; the prehistoric monument at Stonehenge was set out by prehistoric surveyors using peg and rope geometry. The mathematician Liu Hui described ways of measuring distant objects in his work Haidao Suanjing or The Sea Island Mathematical Manual, published in 263 AD; the Romans recognized land surveying as a profession.
They established the basic measurements under which the Roman Empire was divided, such as a tax register of conquered lands. Roman surveyors were known as Gromatici. In medieval Europe, beating the bounds maintained the boundaries of a village or parish; this was the practice of gathering a group of residents and walking around the parish or village to establish a communal memory of the boundaries. Young boys were included to ensure the memory lasted as long as possible. In England, William the Conqueror commissioned the Domesday Book in 1086, it recorded the names of all the land owners, the area of land they owned, the quality of the land, specific information of the area's content and inhabitants. It did not include maps showing exact locations. Abel Foullon described a plane table in 1551, but it is thought that the instrument was in use earlier as his description is of a developed instrument. Gunter's chain was introduced in 1620 by English mathematician Edmund Gunter, it enabled plots of land to be surveyed and plotted for legal and commercial purposes.
Leonard Digges described a Theodolite that measured horizontal angles in his book A geometric practice named Pantometria. Joshua Habermel created a theodolite with a compass and tripod in 1576. Johnathon Sission was the first to incorporate a telescope on a theodolite in 1725. In the 18th century, modern techniques and instruments for surveying began to be used. Jesse Ramsden introduced the first precision theodolite in 1787, it was an instrument for measuring angles in vertical planes. He created his great theodolite using an accurate dividing engine of his own design. Ramsden's theodolite represented a great step forward in the instrument's accuracy. William Gascoigne invented an instrument that used a telescope with an installed crosshair as a target device, in 1640. James Watt developed an optical meter for the measuring of distance in 1771. Dutch mathematician Willebrord Snellius introduced the modern systematic use of triangulation. In 1615 he surveyed the distance from Alkmaar to Breda 72 miles.
He underestimated this distance by 3.5%. The survey was a chain of quadrangles containing 33 triangles in all. Snell showed, he showed how to resection, or calculate, the position of a point inside a triangle using the angles cast between the vertices at the unknown point. These could be measured more than bearings of the vertices, which depended on a compass, his work established the idea of surveying a primary network of control points, locating subsidiary points inside the primary network later. Between 1733 and 1740, Jacques Cassini and his son César undertook the first triangulation of France, they included a re-surveying of the meridian arc, leading to the publication in 1745 of the first map of France constructed on rigorous principles. By this time triangulation methods were well established for local map-making, it was only towards the end of the 18th century that detailed triangulation network surveys mapped whole countries. In 1784, a team from Gene
A forest is a large area dominated by trees. Hundreds of more precise definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing and ecological function. According to the used Food and Agriculture Organization definition, forests covered 4 billion hectares or 30 percent of the world's land area in 2006. Forests are the dominant terrestrial ecosystem of Earth, are distributed around the globe. Forests account for 75% of the gross primary production of the Earth's biosphere, contain 80% of the Earth's plant biomass. Net primary production is estimated at 21.9 gigatonnes carbon per year for tropical forests, 8.1 for temperate forests, 2.6 for boreal forests. Forests at different latitudes and elevations form distinctly different ecozones: boreal forests near the poles, tropical forests near the equator and temperate forests at mid-latitudes. Higher elevation areas tend to support forests similar to those at higher latitudes, amount of precipitation affects forest composition.
Human society and forests influence each other in both negative ways. Forests serve as tourist attractions. Forests can affect people's health. Human activities, including harvesting forest resources, can negatively affect forest ecosystems. Although forest is a term of common parlance, there is no universally recognised precise definition, with more than 800 definitions of forest used around the world. Although a forest is defined by the presence of trees, under many definitions an area lacking trees may still be considered a forest if it grew trees in the past, will grow trees in the future, or was designated as a forest regardless of vegetation type. There are three broad categories of forest definitions in use: administrative, land use, land cover. Administrative definitions are based upon the legal designations of land, bear little relationship to the vegetation growing on the land: land, designated as a forest is defined as a forest if no trees are growing on it. Land use definitions are based upon the primary purpose.
For example, a forest may be defined as any land, used for production of timber. Under such a land use definition, cleared roads or infrastructure within an area used for forestry, or areas within the region that have been cleared by harvesting, disease or fire are still considered forests if they contain no trees. Land cover definitions define forests based upon the type and density of vegetation growing on the land; such definitions define a forest as an area growing trees above some threshold. These thresholds are the number of trees per area, the area of ground under the tree canopy or the section of land, occupied by the cross-section of tree trunks. Under such land cover definitions, an area of land can only be known as forest if it is growing trees. Areas that fail to meet the land cover definition may be still included under while immature trees are establishing if they are expected to meet the definition at maturity. Under land use definitions, there is considerable variation on where the cutoff points are between a forest and savanna.
Under some definitions, forests require high levels of tree canopy cover, from 60% to 100%, excluding savannas and woodlands in which trees have a lower canopy cover. Other definitions consider savannas to be a type of forest, include all areas with tree canopies over 10%; some areas covered in trees are defined as agricultural areas, e.g. Norway spruce plantations in Austrian forest law when the trees are being grown as Christmas trees and below a certain height; the word forest comes from Middle English, from Old French forest "forest, vast expanse covered by trees". A borrowing of the Medieval Latin word foresta "open wood", foresta was first used by Carolingian scribes in the Capitularies of Charlemagne to refer to the king's royal hunting grounds; the term was not endemic to Romance languages. The exact origin of Medieval Latin foresta is obscure; some authorities claim the word derives from the Late Latin phrase forestam silvam, meaning "the outer wood". Frankish *forhist is attested by Old High German forst "forest", Middle Low German vorst "forest", Old English fyrhþ "forest, game preserve, hunting ground", Old Norse fýri "coniferous forest", all of which derive from Proto-Germanic *furhísa-, *furhíþija- "a fir-wood, coniferous forest", from Proto-Indo-European *perkwu- "a coniferous or mountain forest, wooded height".
Uses of the word "forest" in English to denote any uninhabited area of non-enclosure are now considered archaic. The word was introduced by the Norman rulers of England as a legal term denoting an uncultivated area set aside for hunting by feudal nobility; these hunting forests were not neces
The Great Lakes called the Laurentian Great Lakes and the Great Lakes of North America, are a series of interconnected freshwater lakes in the upper mid-east region of North America, on the Canada–United States border, which connect to the Atlantic Ocean through the Saint Lawrence River. They consist of Lakes Superior, Huron and Ontario, although hydrologically, there are four lakes, Erie and Michigan-Huron; the connected lakes form the Great Lakes Waterway. The Great Lakes are the largest group of freshwater lakes on Earth by total area, second-largest by total volume, containing 21% of the world's surface fresh water by volume; the total surface is 94,250 square miles, the total volume is 5,439 cubic miles less than the volume of Lake Baikal. Due to their sea-like characteristics the five Great Lakes have long been referred to as inland seas. Lake Superior is the second largest lake in the world by area, the largest freshwater lake by area. Lake Michigan is the largest lake, within one country.
The Great Lakes began to form at the end of the last glacial period around 14,000 years ago, as retreating ice sheets exposed the basins they had carved into the land which filled with meltwater. The lakes have been a major source for transportation, migration and fishing, serving as a habitat to a large number of aquatic species in a region with much biodiversity; the surrounding region is called the Great Lakes region. Though the five lakes lie in separate basins, they form a single interconnected body of fresh water, within the Great Lakes Basin, they form a chain connecting the east-central interior of North America to the Atlantic Ocean. From the interior to the outlet at the Saint Lawrence River, water flows from Superior to Huron and Michigan, southward to Erie, northward to Lake Ontario; the lakes drain a large watershed via many rivers, are studded with 35,000 islands. There are several thousand smaller lakes called "inland lakes," within the basin; the surface area of the five primary lakes combined is equal to the size of the United Kingdom, while the surface area of the entire basin is about the size of the UK and France combined.
Lake Michigan is the only one of the Great Lakes, within the United States. The lakes are divided among the jurisdictions of the Canadian province of Ontario and the U. S. states of Michigan, Minnesota, Indiana, Ohio and New York. Both Ontario and Michigan include in their boundaries portions of four of the lakes: Ontario does not border Lake Michigan, Michigan does not border Lake Ontario. New York and Wisconsin's jurisdictions extend into two lakes, each of the remaining states into one of the lakes; as the surfaces of Lakes Superior, Huron and Erie are all the same elevation above sea level, while Lake Ontario is lower, because the Niagara Escarpment precludes all natural navigation, the four upper lakes are called the "upper great lakes". This designation, however, is not universal; those living on the shore of Lake Superior refer to all the other lakes as "the lower lakes", because they are farther south. Sailors of bulk freighters transferring cargoes from Lake Superior and northern Lake Michigan and Lake Huron to ports on Lake Erie or Ontario refer to the latter as the lower lakes and Lakes Michigan and Superior as the upper lakes.
This corresponds to thinking of Lakes Erie and Ontario as "down south" and the others as "up north". Vessels sailing north on Lake Michigan are considered "upbound" though they are sailing toward its effluent current; the Chicago River and Calumet River systems connect the Great Lakes Basin to the Mississippi River System through man-made alterations and canals. The St. Marys River, including the Soo Locks, connects Lake Superior to Lake Huron; the Straits of Mackinac connect Lake Michigan to Lake Huron. The St. Clair River connects Lake Huron to Lake St. Clair; the Detroit River connects Lake St. Clair to Lake Erie; the Niagara River, including Niagara Falls, connects Lake Erie to Lake Ontario. The Welland Canal, bypassing the Falls, connects Lake Erie to Lake Ontario; the Saint Lawrence River and the Saint Lawrence Seaway connect Lake Ontario to the Gulf of St. Lawrence, which connects to the Atlantic Ocean. Lakes Huron and Michigan are sometimes considered a single lake, called Lake Michigan–Huron, because they are one hydrological body of water connected by the Straits of Mackinac.
The straits are 120 feet deep. Lake Nipigon, connected to Lake Superior by the Nipigon River, is surrounded by sill-like formations of mafic and ultramafic igneous rock hundreds of meters high; the lake lies in the Nipigon Embayment, a failed arm of the triple junction in the Midcontinent Rift System event, estimated at 1,109 million years ago. Green Bay is an arm of Lake Michigan, along the south coast of the Upper Peninsula of Michigan and the east coast of Wisconsin, it is separated from the rest of the lake by the Door Peninsula in Wisconsin, the Garden Peninsula in Michigan, the chain of islands between
The Poles referred to as the Polish people, are a nation and West Slavic ethnic group native to Poland in Central Europe who share a common ancestry, culture and are native speakers of the Polish language. The population of self-declared Poles in Poland is estimated at 37,394,000 out of an overall population of 38,538,000, of whom 36,522,000 declared Polish alone. A wide-ranging Polish diaspora exists throughout Europe, the Americas, in Australasia. Today the largest urban concentrations of Poles are within the Warsaw and Silesian metropolitan areas. Poland's history dates back over a thousand years, to c. 930–960 AD, when the Polans – an influential West Slavic tribe in the Greater Poland region, now home to such cities as Poznań, Kalisz and Września – united various Lechitic tribes under what became the Piast dynasty, thus creating the Polish state. The subsequent Christianization of Poland, in 966 CE, marked Poland's advent to the community of Western Christendom. Poles have made important contributions to the world in every major field of human endeavor.
Notable Polish émigrés – many of them forced from their homeland by historic vicissitudes – have included physicists Marie Skłodowska Curie and Joseph Rotblat, mathematician Stanisław Ulam, pianists Fryderyk Chopin and Arthur Rubinstein, actresses Helena Modjeska and Pola Negri, novelist Joseph Conrad, military leaders Tadeusz Kościuszko and Casimir Pulaski, U. S. National Security Advisor Zbigniew Brzezinski, politician Rosa Luxemburg, filmmakers Samuel Goldwyn and the Warner Brothers, cartoonist Max Fleischer, cosmeticians Helena Rubinstein and Max Factor. Slavs have been in the territory of modern Poland for over 1500 years, they organized into tribal units, of which the larger ones were known as the Polish tribes. In the 9th and 10th centuries the tribes gave rise to developed regions along the upper Vistula, the Baltic Sea coast and in Greater Poland; the last tribal undertaking resulted in the 10th century in a lasting political structure and state, one of the West Slavic nations. The concept which has become known as the Piast Idea, the chief proponent of, Jan Ludwik Popławski, is based on the statement that the Piast homeland was inhabited by so-called "native" aboriginal Slavs and Slavonic Poles since time immemorial and only was "infiltrated" by "alien" Celts, Baltic peoples and others.
After 1945 the so-called "autochthonous" or "aboriginal" school of Polish prehistory received official backing in Poland and a considerable degree of popular support. According to this view, the Lusatian Culture which archaeologists have identified between the Oder and the Vistula in the early Iron Age, is said to be Slavonic. In contrast, the critics of this theory, such as Marija Gimbutas, regard it as an unproved hypothesis and for them the date and origin of the westward migration of the Slavs is uncharted. Polish people are the sixth largest national group in the European Union. Estimates vary depending on source, though available data suggest a total number of around 60 million people worldwide. There are 38 million Poles in Poland alone. There are Polish minorities in the surrounding countries including, indigenous minorities in the Czech Republic, Slovakia and eastern Lithuania, western Ukraine, western Belarus. There are some smaller indigenous minorities in nearby countries such as Moldova.
There is a Polish minority in Russia which includes indigenous Poles as well as those forcibly deported during and after World War II. The term "Polonia" is used in Poland to refer to people of Polish origin who live outside Polish borders estimated at around 10 to 20 million. There is a notable Polish diaspora in the United States and Canada. France has a historic relationship with Poland and has a large Polish-descendant population. Poles have lived in France since the 18th century. In the early 20th century, over a million Polish people settled in France during world wars, among them Polish émigrés fleeing either Nazi occupation or Soviet rule. In the United States, a significant number of Polish immigrants settled in Chicago, Detroit, New Jersey, New York City, Pittsburgh and New England; the highest concentration of Polish Americans in a single New England municipality is in New Britain, Connecticut. The majority of Polish Canadians have arrived in Canada since World War II; the number of Polish immigrants increased between 1945 and 1970, again after the end of Communism in Poland in 1989.
In Brazil the majority of Polish immigrants settled in Paraná State. Smaller, but significant numbers settled in the states of Rio Grande do Sul, Espírito Santo and São Paulo; the city of Curitiba has the second largest Polish diaspora in the world and Polish music and culture are quite common in the region. A recent large migration of Poles took place followi
Indigenous peoples of the Americas
The indigenous peoples of the Americas are the Pre-Columbian peoples of North and South America and their descendants. Although some indigenous peoples of the Americas were traditionally hunter-gatherers—and many in the Amazon basin, still are—many groups practiced aquaculture and agriculture; the impact of their agricultural endowment to the world is a testament to their time and work in reshaping and cultivating the flora indigenous to the Americas. Although some societies depended on agriculture, others practiced a mix of farming and gathering. In some regions the indigenous peoples created monumental architecture, large-scale organized cities, city-states, states and empires. Among these are the Aztec and Maya states that until the 16th century were among the most politically and advanced nations in the world, they had a vast knowledge of engineering, mathematics, writing, medicine and irrigation, mining and goldsmithing. Many parts of the Americas are still populated by indigenous peoples.
At least a thousand different indigenous languages are spoken in the Americas. Some, such as the Quechuan languages, Guaraní, Mayan languages and Nahuatl, count their speakers in millions. Many maintain aspects of indigenous cultural practices to varying degrees, including religion, social organization and subsistence practices. Like most cultures, over time, cultures specific to many indigenous peoples have evolved to incorporate traditional aspects but cater to modern needs; some indigenous peoples still live in relative isolation from Western culture and a few are still counted as uncontacted peoples. Indigenous peoples of the United States are known as Native Americans or American Indians and Alaska Natives. Application of the term "Indian" originated with Christopher Columbus, who, in his search for India, thought that he had arrived in the East Indies; those islands came to be known as the "West Indies", a name still used. This led to the blanket term "Indies" and "Indians" for the indigenous inhabitants, which implied some kind of racial or cultural unity among the indigenous peoples of the Americas.
This unifying concept, codified in law and politics, was not accepted by the myriad groups of indigenous peoples themselves, but has since been embraced or tolerated, by many over the last two centuries. Though the term "Indian" does not include the culturally and linguistically distinct indigenous peoples of the Arctic regions of the Americas—such as the Aleuts, Inuit or Yupik peoples, who entered the continent as a second more recent wave of migration several thousand years before and have much more recent genetic and cultural commonalities with the aboriginal peoples of the Asiatic Arctic Russian Far East—these groups are nonetheless considered "indigenous peoples of the Americas". Indigenous peoples are known in Canada as Aboriginal peoples, which includes not only First Nations and Arctic Inuit, but the minority population of First Nations-European mixed race Métis people who identify culturally and ethnically with indigenous peoplehood; this is contrasted, for instance, to the American Indian-European mixed race mestizos of Hispanic America who, with their larger population, identify as a new ethnic group distinct from both Europeans and Indigenous Americans, but still considering themselves a subset of the European-derived Hispanic or Brazilian peoplehood in culture and ethnicity.
The term Amerindian and its cognates find preferred use in scientific contexts and in Quebec, the Guianas and the English-speaking Caribbean. Indígenas or pueblos indígenas is a common term in Spanish-speaking countries and pueblos nativos or nativos may be heard, while aborigen is used in Argentina and pueblos originarios is common in Chile. In Brazil, indígenas or povos indígenas are common if formal-sounding designations, while índio is still the more often-heard term and aborígene and nativo being used in Amerindian-specific contexts; the Spanish and Portuguese equivalents to Indian could be used to mean any hunter-gatherer or full-blooded Indigenous person to continents other than Europe or Africa—for example, indios filipinos. The specifics of Paleo-Indian migration to and throughout the Americas, including the exact dates and routes traveled, are the subject of ongoing research and discussion. According to archaeological and genetic evidence and South America were the last continents in the world to gain human habitation.
During the Wisconsin glaciation, 50–17,000 years ago, falling sea levels allowed people to move across the land bridge of Beringia that joined Siberia to northwest North America. Alaska was a glacial refugium; the Laurentide Ice Sheet covered most of North America, blocking nomadic inhabitants and confining them to Alaska for thousands of years. Indigenous genetic studies suggest that the first inhabitants of the Americas share a single ancestral population, one that developed in isolation, conjectured to be Beringia; the isolat
Port Huron, Michigan
Port Huron is a city in the U. S. state of Michigan and the county seat of St. Clair County; the population was 30,184 at the 2010 census. The city is administratively autonomous. Located along the St. Clair River, it is connected to Point Edward, Ontario in Canada via the Blue Water Bridge; the city is the easternmost point on land in Michigan. Port Huron is home to two paper mills, Mueller Brass, many businesses related to tourism and the automotive industry; the city features a historic downtown area, marina, museum and the McMorran Place arena and entertainment complex. This area was long occupied by the Ojibwa people. French colonists had a temporary trading fort at this site in the 17th century. In 1814 following the War of 1812, the United States established Fort Gratiot at the base of Lake Huron. A community developed around it; the early 19th century was the first time a settlement developed with a permanent European-American population. Until 1836, an Ojibwa reservation occupied land in part of the modern area of Port Huron.
They were removed by the United States to west of the Mississippi River in Minnesota. In 1857, Port Huron became incorporated, its population grew after the 1850s due a high rate of immigration attracted by the successful shipbuilding and lumber industries. In 1859 the city had a total of 4,031 residents. By 1870, Port Huron's population exceeded that of surrounding villages. In 1871, the State Supreme Court designated Port Huron as the county seat. On October 8, 1871, the city, as well as places north in Sanilac and Huron counties, burned in the Port Huron Fire of 1871. A series of other fires leveled Holland and Manistee, Michigan, as well as Peshtigo and Chicago on the same day; the Thumb Fire that occurred a decade also engulfed Port Huron. In 1895 the village of Fort Gratiot, in the vicinity of the former Fort Gratiot, was annexed by the city of Port Huron; the following historic sites have been recognized by the State of Michigan through its historic marker program. Fort St. Joseph; the fort was built in 1686 by the French explorer Duluth.
This fort was the second European settlement in lower Michigan. This post guarded the upper end of the St. Clair River, the vital waterway joining Lake Erie and Lake Huron. Intended by the French to bar English traders from the upper lakes, the fort in 1687 was the base of a garrison of French and Indians. In 1688 the French abandoned this fort; the site was incorporated into Fort Gratiot in 1814. A park has been established at the former site of the fort. Fort Gratiot Light; the Fort Gratiot Lighthouse was built in 1829 to replace a tower destroyed by a storm. In the 1860s workers extended the tower to its present height of 84 feet; the light, automated in 1933, continues to guide shipping on Lake Huron into the narrow and swift-flowing St. Clair River, it was the first lighthouse established in the State of Michigan. Lightship Huron. From 1935 until 1970, the Huron was stationed in southern Lake Huron to mark dangerous shoals. After 1940 the Huron was the only lightship operating on the Great Lakes.
Retired from Coast Guard Service in 1970, she was presented to the City of Port Huron in 1971. Grand Trunk Railway Depot; the depot, now part of the Port Huron Museum, is where 12-year-old Thomas Edison departed daily on the Port Huron – Detroit run. In 1859, the railroad's first year of operation, Edison convinced the railroad company to let him sell newspapers and confections on the daily trips, he became so successful. He made enough money to buy chemicals and other experimental materials. Port Huron Public Library. In 1902 the city of Port Huron secured money from philanthropist Andrew Carnegie to erect a municipal library. In 1904, a grand Beaux-Arts-style structure was built at a cost of $45,000. At its dedication, Melvil Dewey, creator of a used book classification system, delivered the opening address; the Port Huron Public Library served in its original capacity for over sixty years. In 1967, a larger public library was constructed; the following year the former library was renovated and re-opened as the Port Huron Museum of Arts and History.
An addition was constructed in 1988. Harrington Hotel; the Hotel opened in 1896 and is a blend of Romanesque and Queen Anne architecture. The hotel closed in 1986, but a group of investors bought the structure that same year to convert it into housing for senior citizens; the Harrington Hotel is listed on the National Register of Historic Places. Grand Trunk Western Railroad Tunnel; the tunnel links Port Huron with Canada. This international submarine railway tunnel was the first international tunnel in the world; the tunnel's total length is 6,025 feet, with 2,290 feet underwater. The tunnel operations were electrified in 1908. Tracks were lowered in 1949 to accommodate larger freight cars. During World War I, a plot to blast the tunnel was foiled. A new tunnel has since been opened; the city received the All-America City Award in 1955 and 2005. Port Huron is the only site in Michigan; the event is now memorialized. According to the United States Census Bureau, the city has a total area of 12.26 square miles, of which 8.08 square miles is land and 4.18 square miles is water.
The city is considered to be part of the Thumb area of East-Central Michigan called the Blue Water Area. The easternmost point of Michigan can be found in Port Huron, near the site of the Municip